Add extention to the inkscape to edit one of the active/normal/click frame of a button. There is one unsolved issue. Users can not know the current frame easily unless they check the XML node editor. We should try to show something in the UI. However, I have no found any goo dway to do this. We may need to modify the inkscape directly for this function in the future.

INCLUDES = -I$(top_srcdir)/include